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<p>In order to effectively strengthen the blocking efficiency of the protective structure on the particle flow, a numerical analysis model of slit dam blocking is constructed by PFC-3D, and 3D laser scanning of stones is used to construct a model of the real debris particles, which breaks through the limitation of the assumption of spherical particles in the traditional numerical simulation and analyses the blocking efficiency of the slit dams on the particle flow and the withstand loads. Specifically, (1) the experiments explored the blocking efficiency of the dam for different particle sizes of debris flow; the increase in particle size made the blocking efficiency of the first row of slit dam decrease from 43.65 to 34.16%, the second-row blocking efficiency increased from 54.03 to 61.70%, and the two rows of piles subjected to the impact peak showed an increasing trend. (2) The increase of the distance of the foot of the slope made the blocking efficiency of the first row of slit dam increase from 33.23 to 69.61%, the second-row blocking efficiency from 61.82 to 28.71%, and two rows of piles subjected to impact peak showed a decreasing trend. (3) Pile-type combinations I and II in the total blocking efficiency are similar to the other combinations. However, its first row of piles in the same position of the impact peak as the combination of the III and IV is smaller than the first row of piles in the same location of the impact peak, which is not a significant difference.</p>

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Study of interception and impact forces of dry granular flow on slit dams under different factors

  • 期刊论文

  • 发表日期：

    2025年10月23日

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  • Yuqiong He,
  • Xuanyi Zhou,
  • Lida Wang,
  • Jiahui Du,
  • Zhiqun Zhong

摘要

In order to effectively strengthen the blocking efficiency of the protective structure on the particle flow, a numerical analysis model of slit dam blocking is constructed by PFC-3D, and 3D laser scanning of stones is used to construct a model of the real debris particles, which breaks through the limitation of the assumption of spherical particles in the traditional numerical simulation and analyses the blocking efficiency of the slit dams on the particle flow and the withstand loads. Specifically, (1) the experiments explored the blocking efficiency of the dam for different particle sizes of debris flow; the increase in particle size made the blocking efficiency of the first row of slit dam decrease from 43.65 to 34.16%, the second-row blocking efficiency increased from 54.03 to 61.70%, and the two rows of piles subjected to the impact peak showed an increasing trend. (2) The increase of the distance of the foot of the slope made the blocking efficiency of the first row of slit dam increase from 33.23 to 69.61%, the second-row blocking efficiency from 61.82 to 28.71%, and two rows of piles subjected to impact peak showed a decreasing trend. (3) Pile-type combinations I and II in the total blocking efficiency are similar to the other combinations. However, its first row of piles in the same position of the impact peak as the combination of the III and IV is smaller than the first row of piles in the same location of the impact peak, which is not a significant difference.